EP0178766B1 - Anodenklammer - Google Patents

Anodenklammer Download PDF

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Publication number
EP0178766B1
EP0178766B1 EP85306131A EP85306131A EP0178766B1 EP 0178766 B1 EP0178766 B1 EP 0178766B1 EP 85306131 A EP85306131 A EP 85306131A EP 85306131 A EP85306131 A EP 85306131A EP 0178766 B1 EP0178766 B1 EP 0178766B1
Authority
EP
European Patent Office
Prior art keywords
anode
rod
anode rod
bus
clamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85306131A
Other languages
English (en)
French (fr)
Other versions
EP0178766A1 (de
Inventor
Warne R. Hale
Rodney D. Zabreznik
Peter A. Yong
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kaiser Aluminum and Chemical Corp
Original Assignee
Kaiser Aluminum and Chemical Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kaiser Aluminum and Chemical Corp filed Critical Kaiser Aluminum and Chemical Corp
Publication of EP0178766A1 publication Critical patent/EP0178766A1/de
Application granted granted Critical
Publication of EP0178766B1 publication Critical patent/EP0178766B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/16—Electric current supply devices, e.g. bus bars

Definitions

  • This invention pertains to anode clamps used in an aluminum reduction cell, and particularly to such clamps useful during bake-out of the cathode of the cell.
  • Aluminum is commonly produced by the electrolytic reduction of aluminum oxide to aluminum metal in an electrolytic cell comprising a carbonaceous cathode which forms a dish for holding the molten aluminum produced, together with an overlying layer of electrolyte or bath in which the aluminum oxide to be reduced is dissolved.
  • An electric current is introduced into the cell by means of anodes suspended in and contacting the electrolytic bath. These anodes are mechanically and electrically connected by means of vertical anode rods embedded in the anodes and attached to anode bus bars suspended over the reduction cell.
  • Unidirectional electric current is introduced to the cell through the anode bus, anode rods, and anodes, passing through the electrolytic bath, thereby reducing the aluminum oxide to aluminum metal, and leaves the cell by passing through the pad of molten aluminum and the underlying cathode, from which it is removed by collector bars and thence carried to the anode bus ⁇ of the adjacent cell.
  • a bed of sized carbon resistor material is evenly spread over the carbon blocks making up the cathode, and the anodes with attached anode rods are lowered onto the bed. Partial or full line amperage is then fed through the cell and the resistance heat generated bakes the cathode ramming paste placed between and around the cathode blocks and heats up the cathode body prior to introduction of the electrolytic bath.
  • the present invention is directed to a simplified and more satisfactory solution to the problem of an anode clamp for use during bake-out of an aluminum reduction cell.
  • the invention provides an anode clamp for use in continuously urging an anode rod against an anode bus so as to maintain intimate electrical contact of the anode rod with the anode bus in an aluminium reduction cell during the bake-out of the cathode bottom portion of the cell, the clamp comprising a yoke arranged adjacent to the anode rod, portions of the yoke serving as a carrier for an anode rod contacting means which is provided with a curved anode rod contacting surface, and being characterised by resilient biasing means carried by the yoke and urging the anode rod contacting means and the anode rod contacting surface thereof against a portion of the anode rod, the contacting surface being movable along the anode rod substantially parallel to the longitudinal axis of the anode rod whilst being urged into intimate contact with the rod by the resilient biasing means, whereby the anode rod is urged against the anode bus regardless of movement of the anode rod relative to the anode rod contacting means
  • 11 indicates the anode bus and 12 the anode rod to be clamped thereto.
  • Brackets 13a and 13b are bolted to anode bus 11 and carry the removable anode clamp, generally indicated by 14, which is retained in place by bearing against studs 16a and 16b, on brackets 13.
  • Brackets 13 and studs 16a, 16b are part of the regular, permanent anode clamp, the details of which are not shown for purposes of clarity in illustrating the removable anode clamp of the present invention. It will be understood by those skilled in the art that studs 16a, 16b are rotated to engage arms (not shown) that are part of the permanent clamp for anode rod 12. It will also be understood that details of the structure of the clamp of the present invention may be modified so that it will fit mechanically on otherforms of regular or permanent anode clamps or on the brackets carrying such clamps.
  • the clamp of this invention comprises a generally U-shaped yoke 17, the ends 20b and 20c of which rest on brackets 13, and the central portion of which carries rollers 18 which bear against anode rod 12.
  • bracket 13b is lower than bracket 13a. Accordingly, one arm of yoke 17 is off-set from the other. To prevent twisting of the clamp when it is engaged, one arm of yoke 17 is made of two pieces, a lower piece 20b resting on bracket 13b and an upper piece 20a located in the same plane as the opposite arm 20c of yoke 17. It will be understood that this arrangement is peculiar to use of the clamp of the present invention with the particular configuration shown, and is not an essential feature of the invention.
  • rollers 18 are urged against anode rod 12 by spring 19 within a housing carried on yoke 17.
  • handle 21 turns threaded rod 22 so as to increase or decrease the force exerted by spring 18 on rollers 18.
  • the spring used may be any suitbale type of spring, the type of spring known as a spring washer or Bellville spring has been used successfully, and is illustrated schematically in Figure 2.
  • the clamp of the present invention may be made of any suitable material, usually nonmagnetic, for example stainless steel.
  • parts, for example the rollers may be made of other suitable materials such as high temperature plastic.
  • the clamp of the present invention is set in position during the bake-out operation, after which it can be removed and the conventional clamp, as mentioned above, engaged while the cell is being operated to produce aluminum.
  • the advantages of the clamp of the present invention over prior art clamps is that the anode rod can move vertically in response to expansion of the anode and/or cathode during bake-out, while at the same time intimate contact is maintained between the anode rod and the anode bus.
  • the clamps of the present invention are simply and easily installed and removed, particularly because of their relatively light weight compared with, for example, flexible straps.
  • the clamps of the present invention are relatively inexpensive to manufacture, easy to maintain, and durable.
  • spring and roller pieces shown can be replaced by equivalent structures.
  • a spring instead of a spring, one could use an hydraulic or pneumaticforce exerting cell.
  • the rollers instead of the rollers, one could use a curved leaf spring to maintain the anode rod in contact with the anode bus while at the same time permitting relative vertical movement between the two.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Measurement Of Radiation (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Vehicle Body Suspensions (AREA)

Claims (8)

1. Anodenklammer zum kontinuierlichen Anpressen einer Anodenstange (12) an eine Anodensammelleitung (11), um während der Brennphase des kathodischen Bodenteils einer Aluminium-Reduktionszelle vor deren Inbetriebnahme einen innigen elektrischen Kontakt der Anodenstange (12) und der Anodensammelleitung (11) aufrechtzuerhalten, wobei die Klammer aus einem, in der Nähe der Anodenstange (12) angeordneten Joch (17) besteht, wobei Teile des Joches (17) als Träger für Mittel (18) zum Kontaktieren der Anordenstange (12) dienen und wobei das Mittel (18) mit einer gekrümmten Kontaktfläche für die Anodenstange (12) versehen ist, gekennzeichnet durch federnd wirkende, an dem Joch (17) angebrachte Mittel (19) zur Erzeugung einer Vorspannung zum Anpressen des Mittels (18) sowie dessen Kontaktfläche an ein Teil der Anodenstange (12), wobei die genannte Kontaktfläche im wesentlichen parallel zur Längsachse der Anodenstange (12) entlang dieser bewegbar ist und durch das federnd wirkende Mittel (19) in einem innigen Kontakt mit der Anodenstange (12) gehalten wird, so daß die Anodenstange (12) ihrerseits unabhängig von ihrer Relativbewegung gegenüber dem Mittel (18) zum Kontaktieren bzw. gegenüber der Anodensammelleitung (11) gegen die Anordensammelleitung (11) gepreßt wird.
2. Anodenklammer nach Anspruch 1, dadurch gekennzeichnet, daß das Mittel (18) zum Kontaktieren der Anodenstange (12) aus einer Rolle besteht, deren Rotationsachse sich quer zur Längsachse der Anodenstange (12) erstreckt.
3. Anodenklammer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das federnd wirkende Mittel zur Erzeugung einer Vorspannung aus wenigstens einer Feder (19) besteht.
4. Anodenklammer nach Anspruch 3, dadurch gekennzeichnet, daß die Feder aus wenigstens einer Federscheibe (19) besteht.
5. Anodenklammer nach Anspruch 3 oder 4, gekennzeichnet durch Mittel (21, 22) zur Einstellung der durch die Feder (19) ausgeübten Kraft.
6. Anodenklammer nach Anspruch 5, gekennzeichnet durch Mittel zum Anspannen der Feder des Mittels (19) zur Erzeugung einer Vorspannung.
7. Anodenklammer nach Anspruch 6, dadurch gekennzeichnet, daß das Mittel zum Anspannen der Feder ein schraubenartiges Mittel ist.
8. Anodenklammer nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß das Joch (17) an der Anodensammelleitung (11) befestigt ist.
EP85306131A 1984-10-18 1985-08-29 Anodenklammer Expired EP0178766B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66303084A 1984-10-18 1984-10-18
US663030 2003-09-15

Publications (2)

Publication Number Publication Date
EP0178766A1 EP0178766A1 (de) 1986-04-23
EP0178766B1 true EP0178766B1 (de) 1988-11-02

Family

ID=24660221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85306131A Expired EP0178766B1 (de) 1984-10-18 1985-08-29 Anodenklammer

Country Status (5)

Country Link
EP (1) EP0178766B1 (de)
AU (1) AU4850485A (de)
CA (1) CA1263948C (de)
DE (1) DE3566001D1 (de)
NO (1) NO170292C (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4114416A1 (de) * 1991-05-03 1992-11-05 Westfalia Becorit Ind Tech Einrichtung zur reinigung der an anodenstangen angeordneten restanoden
BR0215868B1 (pt) 2002-10-14 2012-09-04 limitador de escapamento de uma célula de eletrólise e célula de eletrólise.
FR2854906B1 (fr) 2003-05-12 2006-06-16 Ecl Organe de manutention de connecteurs de cellules d'electrolyse destinees a la production d'aluminium
CN100500946C (zh) * 2005-03-14 2009-06-17 贵阳铝镁设计研究院 预焙阳极电解槽阳极夹具
FR2884833B1 (fr) * 2005-04-20 2007-05-25 Ecl Soc Par Actions Simplifiee Dispositif et procede de maintien et de raccordement d'une tige d'anode sur un cadre anodique d'une cellule d'electrolise de l'aluminium
FR2989693B1 (fr) * 2012-04-24 2015-06-12 Rio Tinto Alcan Int Ltd Connecteur de prechauffage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH552679A (de) * 1971-07-09 1974-08-15 Alusuisse Vorrichtung zur loesbaren verbindung von anodenstangen.
US3749661A (en) * 1971-08-04 1973-07-31 H Cook Anode transport frame locking device
IT1033640B (it) * 1975-05-23 1979-08-10 Vendramini A Dispositivo per il serraggio degli elettrodi contro le traverse di supporto nelle celle elettrolitiche per la produzione di alluminio

Also Published As

Publication number Publication date
AU4850485A (en) 1986-04-24
EP0178766A1 (de) 1986-04-23
NO170292B (no) 1992-06-22
CA1263948A (en) 1989-12-19
CA1263948C (en) 1989-12-19
DE3566001D1 (en) 1988-12-08
NO853983L (no) 1986-04-21
NO170292C (no) 1992-09-30

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